<div class="refentry" title="glColorMask"><a id="glColorMask"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glColorMask — enable and disable writing of color buffer
        components</p></div><div class="refsynopsisdiv" title="C Specification"><h2>C Specification</h2><div class="funcsynopsis"><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glColorMask</b>(</code></td><td>GLboolean <var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLboolean <var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLboolean <var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLboolean <var class="pdparam">alpha</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Parameters"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term">
                <em class="parameter"><code>red</code></em>,
                <em class="parameter"><code>green</code></em>,
                <em class="parameter"><code>blue</code></em>,
                <em class="parameter"><code>alpha</code></em>
                </span></dt><dd><p>Specify whether red, green, blue, and alpha can or
                    cannot be written into the color buffer. The initial
                    values are all <code class="constant">GL_TRUE</code>,
                    indicating that all color components can be written.</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="description"></a><h2>Description</h2><p>
        <code class="function">glColorMask</code>
        specifies whether the individual components in the color
        buffer can or cannot be written. If <em class="parameter"><code>red</code></em> is
        <code class="constant">GL_FALSE</code>,
        for example, no change is made to the red component of any
        pixel in the color buffer, regardless of the drawing operation
        attempted, including
        <a class="citerefentry" href="glClear"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a>.
        </p><p>Changes to individual bits of components cannot be
        controlled. Rather, changes are either enabled or disabled for
        entire color components.</p></div><div class="refsect1" title="See Also"><a id="seealso"></a><h2>See Also</h2><p>
        <a class="citerefentry" href="glClear"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a>,
        <a class="citerefentry" href="glColor"><span class="citerefentry"><span class="refentrytitle">glColor</span></span></a>,
        <a class="citerefentry" href="glColorPointer"><span class="citerefentry"><span class="refentrytitle">glColorPointer</span></span></a>,
        <a class="citerefentry" href="glDepthMask"><span class="citerefentry"><span class="refentrytitle">glDepthMask</span></span></a>,
        <a class="citerefentry" href="glStencilMask"><span class="citerefentry"><span class="refentrytitle">glStencilMask</span></span></a>
        </p></div><div class="refsect1" title="Copyright"><a id="copyright"></a><h2>Copyright</h2><p>
            Copyright © 2003-2004
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <a class="ulink" href="https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/" target="_top">https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/</a>.
        </p></div></div>
